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Bug #13369 » tracepoint-bug-example.rb

backus (John Backus), 03/27/2017 05:49 AM

 
class Foo
MyError = Class.new(StandardError)

def example1
norf
rescue MyError => error
2
end

def example2
norf
rescue MyError => error
return 2
end

def norf
raise MyError
end
end

trace = TracePoint.new(:return) do |tp|
puts "#{tp.defined_class}##{tp.method_id} RETURNS #{tp.return_value.inspect}"
end

trace.enable

Foo.new.example1 # => 2
puts
Foo.new.example2 # => 2
# >> Foo#norf RETURNS nil
# >> Foo#example1 RETURNS 2
# >>
# >> Foo#norf RETURNS nil
# >> Foo#example2 RETURNS nil
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